Appendix D: Probe Selection
TDS 500D, TDS 600B, & TDS 700D User Manual
D–5
Use a current probe by clipping its jaws around the wire carrying the current that
you want to measure. (Unlike an ammeter which you must connect in series with
the circuit.) Because current probes are noninvasive, with loading typically in the
milliohm to low range, they are especially useful where low loading of the
circuit is important. Current probes can also make differential measurements by
measuring the results of two opposing currents in two conductors in the jaws of
the probe.
Figure D–2: A6303 Current Probe Used in the AM 503S Opt. 03
NOTE. Attempting to measure more than 40 amperes of total, in-phase current
(DC + peak AC) using three or more TCP202 current probes installed on the
input channels can result in measurement or display errors.
Optical Probes
Optical probes let you blend the functions of an optical power meter with the
high-speed analog waveform analysis capability of an oscilloscope. You have the
capability of acquiring, displaying, and analyzing optical and electrical signals
simultaneously.
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